Is there "cardiovascular drift" during and after simulated orthostasis in humans?

H. G. Hinghofer-Szalkay, Z. László, A. Rössler

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Abstract

This study investigates the time course of hemodynamic variables during and after simulated orthostasis (lower body suction at 55mmHg for 30 mins: LBNP-55). Individual strategies of blood pressure defense could be observed; LBNP-55 increased heart rate and reduced stroke volume, but was non-hypotensive. During 20 minutes post-LBNP, heart rate was decreased as well as stroke volume index below pre-LBNP values. The reduced cardiac index together with unchanged mean arterial pressure gave a highly significant increase of peripheral resistance after LBNP. The validity of stroke volume results under the experimental conditions given needs to be clarified.

Original languageEnglish
Pages (from-to)P19-20
JournalJournal of gravitational physiology : a journal of the International Society for Gravitational Physiology
Volume2
Issue number1
Publication statusPublished - 1995

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ASJC Scopus subject areas

  • Medicine(all)

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